Reply by Jorge G.

He very, very, very, slowly moved his finger forward NOWHERE NEAR the speed of a regular cut

No he did not, the film was made with high speed cameras, thus appearing as if he was moving his finger very slow. There was another version of the same film but not as close to the blade where he is seen moving the finger very fast.

-- To surrender a dream leaves life as it is — and not as it could be.